style: fix black formatting in apps.py

Author: hsluoyz

casbin_adapter/apps.py

@@ -7,4 +7,5 @@ class CasbinAdapterConfig(AppConfig):
 
     def ready(self):
         from .enforcer import enforcer
+
         enforcer.db_alias = getattr(settings, "CASBIN_DB_ALIAS", "default")